EP0976652A1 - Lightning protection system for composite aircraft structures - Google Patents

Lightning protection system for composite aircraft structures Download PDF

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Publication number
EP0976652A1
EP0976652A1 EP99500128A EP99500128A EP0976652A1 EP 0976652 A1 EP0976652 A1 EP 0976652A1 EP 99500128 A EP99500128 A EP 99500128A EP 99500128 A EP99500128 A EP 99500128A EP 0976652 A1 EP0976652 A1 EP 0976652A1
Authority
EP
European Patent Office
Prior art keywords
fastening
covering
structural
lightning
insulating material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99500128A
Other languages
German (de)
English (en)
French (fr)
Inventor
Felipe Sequeiros Murciano
Roberto Apestigue Garcia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Defence and Space SA
Original Assignee
Construcciones Aeronauticas CASA SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Construcciones Aeronauticas CASA SA filed Critical Construcciones Aeronauticas CASA SA
Publication of EP0976652A1 publication Critical patent/EP0976652A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D45/00—Aircraft indicators or protectors not otherwise provided for
    • B64D45/02—Lightning protectors; Static dischargers

Definitions

  • the present invention refers to a system to protect structural components, particularly fuel deposits or tanks manufactured with composite materials, against electric discharges, especially lightnings.
  • zone 1 It is known that due to their application fuel tanks used in aircraft are exposed to lightning impacts, the most severe impacts being limited to wing tip areas and stabilizers, etc. These areas are called “zone 1" and should support direct lightning impacts with current peaks of 2 x 10 5 Amp and with an energy transfer of 2 x 10 6 Amp 2 sec. Other areas, also exposed to the action of these impacts, but with discharges of less intensity due to the sweeping of the lightning from zone 1 over the surfaces of the mentioned areas, are called “zone 2".
  • the fuel tanks were manufactured with metal (normally aluminum) and accordingly could be located in areas of the zone 2 type, without any arc formation problem in their interior in case of lightning impact, on the one hand due to the fact that being a large conducting metal mass, the lightning energy is absorbed and conducted by the metal and, on the other hand, as the fastening components, particularly the rivets which could be more critical parts, are closely joined to the rest of the structure they behave like a part of it.
  • the protection material which is commonly used for metal structures against lightning and electric discharges in general is normally aluminum.
  • This aluminum is normally applied by flame atomization, as a woven mesh, a sheet or a cladding.
  • This previously known method operates satisfactorily when the structure consists of a dielectric material such as glass fiber or Kevlar epoxy resin.
  • aluminum is galvanically incompatible with a composite material of epoxide and graphite, which is one of the composite materials currently preferred. If this composite material of epoxide and graphite is not isolated, the aluminum will corrode; if it is isolated, the aluminum loses its effectiveness as a protection system (since no electric path is produced).
  • the nuts are installed electrically insulated from the internal structure so as to interrupt the flow of electric current in case of lightning impact.
  • the fastening elements (rivets) of the mentioned rivetable nut are coated with an insulating material.
  • the nut may also be coated with the mentioned insulating material.
  • the external coating (E.C.) is shown with a rivet (R), for example of titanium, crossing it, the rivet also crossing an internal part (I.P.) fastened to said external coating.
  • a nut (N) stabilizes the fastening between the external coating (E.C.) and the internal part (I.P.).
  • a metal mesh layer (1) which covers the outer face exposed to lightning impacts is placed (for protection in zone 1); a metal material strip (3) on the outside of the row of rivets (R); and an insulating material part (2) placed inside the internal part (I.P.) to be fastened (specifically on the surface where the nut (N) is supported).
  • the rivetable nut (N) (coated or not with insulating material) is inserted in the internal structural part (I.P.) by means of its fastening rivets (4) coated with insulating material.
  • An organic finishing (O.F.) that may be a paint and which may provide a decorative appearance, covers the entire external structure, including the heads of the rivets (R).

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Connection Of Plates (AREA)
  • Laminated Bodies (AREA)
  • Elimination Of Static Electricity (AREA)
EP99500128A 1998-07-29 1999-07-28 Lightning protection system for composite aircraft structures Withdrawn EP0976652A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9801612 1998-07-29
ES9801612A ES2163951B1 (es) 1998-07-29 1998-07-29 Un sistema de proteccion contra descargas electricas, especialmente rayos, de componentes estructurales de aviones.

Publications (1)

Publication Number Publication Date
EP0976652A1 true EP0976652A1 (en) 2000-02-02

Family

ID=8304692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99500128A Withdrawn EP0976652A1 (en) 1998-07-29 1999-07-28 Lightning protection system for composite aircraft structures

Country Status (2)

Country Link
EP (1) EP0976652A1 (es)
ES (1) ES2163951B1 (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455286A1 (en) 2010-11-22 2012-05-23 EADS Construcciones Aeronauticas, S.A. Lightning protection for composite aircraft structures
EP2465776A2 (en) 2010-12-14 2012-06-20 Airbus Operations S.L. Lightning and corrosion protection arrangement in an aircraft structural component
CN111824432A (zh) * 2019-04-18 2020-10-27 成都飞机工业（集团）有限责任公司 一种飞机油箱的防雷击式放油结构
CN114180083A (zh) * 2021-11-19 2022-03-15 中国直升机设计研究所 一种利用铜杯实现的复合材料结构件之间导电处理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2279664B1 (es) * 2004-12-30 2008-08-01 Airbus España S.L. Dispositivo de proteccion contra descargas electricas en aeronaves.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775713A (en) 1972-11-03 1973-11-27 Westinghouse Electric Corp Circuit breaker with externally operable means for manual adjustment and manual tripping
WO1984001487A1 (en) 1982-09-30 1984-04-12 Boeing Co Integral lightning protection system for composite aircraft skins
ES8800670A1 (es) 1985-03-25 1987-11-16 Univ Rockefeller Un metodo para preparar estano mesoporfirina.
ES8800669A1 (es) 1985-02-25 1987-11-16 Ici Plc Procedimiento para extraer metales de soluciones acuosas de sales metalicas conteniendo aniones haluro o seudohaluro
EP0248122A2 (en) * 1986-06-06 1987-12-09 The Boeing Company Lightning protection system for conductive composite material structure
GB2212580A (en) * 1987-11-14 1989-07-26 British Aerospace Anti-lightning fastener
FR2626629A1 (fr) * 1988-01-29 1989-08-04 Aerospatiale Procede et dispositif de fixation d'elements de structures d'aeronefs protegees contre la foudre, et outil pour la mise en oeuvre de ce procede
EP0685389A1 (en) * 1994-06-02 1995-12-06 British Aerospace Public Limited Company Method of fastening composite aircraft skins
FR2765066A1 (fr) * 1997-06-20 1998-12-24 Aerospatiale Structure anti-etincelage, notamment pour aeronef

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2006356A6 (es) * 1988-03-07 1989-04-16 Const Aeronauticas Sa Un sistema de proteccion contra descargas electricas, especialmente rayos, de componentes estructurales de aviones, particularmente depositos o tanques de combustible fabricados de materiales compuestos.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775713A (en) 1972-11-03 1973-11-27 Westinghouse Electric Corp Circuit breaker with externally operable means for manual adjustment and manual tripping
WO1984001487A1 (en) 1982-09-30 1984-04-12 Boeing Co Integral lightning protection system for composite aircraft skins
ES8800669A1 (es) 1985-02-25 1987-11-16 Ici Plc Procedimiento para extraer metales de soluciones acuosas de sales metalicas conteniendo aniones haluro o seudohaluro
ES8800670A1 (es) 1985-03-25 1987-11-16 Univ Rockefeller Un metodo para preparar estano mesoporfirina.
EP0248122A2 (en) * 1986-06-06 1987-12-09 The Boeing Company Lightning protection system for conductive composite material structure
GB2212580A (en) * 1987-11-14 1989-07-26 British Aerospace Anti-lightning fastener
FR2626629A1 (fr) * 1988-01-29 1989-08-04 Aerospatiale Procede et dispositif de fixation d'elements de structures d'aeronefs protegees contre la foudre, et outil pour la mise en oeuvre de ce procede
EP0685389A1 (en) * 1994-06-02 1995-12-06 British Aerospace Public Limited Company Method of fastening composite aircraft skins
FR2765066A1 (fr) * 1997-06-20 1998-12-24 Aerospatiale Structure anti-etincelage, notamment pour aeronef

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455286A1 (en) 2010-11-22 2012-05-23 EADS Construcciones Aeronauticas, S.A. Lightning protection for composite aircraft structures
US20120126054A1 (en) * 2010-11-22 2012-05-24 EADS Construcciones Aeronauticas, S.L. Lightning protection for composite aircraft structures
EP2465776A2 (en) 2010-12-14 2012-06-20 Airbus Operations S.L. Lightning and corrosion protection arrangement in an aircraft structural component
CN102556357A (zh) * 2010-12-14 2012-07-11 空中客车运作有限公司 飞机结构部件中的雷电和腐蚀防护装置
US9016615B2 (en) 2010-12-14 2015-04-28 Airbus Operations S.L. Lightning and corrosion protection arrangement in an aircraft structural component
CN111824432A (zh) * 2019-04-18 2020-10-27 成都飞机工业（集团）有限责任公司 一种飞机油箱的防雷击式放油结构
CN114180083A (zh) * 2021-11-19 2022-03-15 中国直升机设计研究所 一种利用铜杯实现的复合材料结构件之间导电处理方法
CN114180083B (zh) * 2021-11-19 2023-09-01 中国直升机设计研究所 一种利用铜杯实现的复合材料结构件之间导电处理方法

Also Published As

Publication number Publication date
ES2163951A1 (es) 2002-02-01
ES2163951B1 (es) 2003-05-16

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